longacre



F. v. D. LONGACRE.

I VALVE. APPLICATION FILED AUG-9,1919- PatentedSep u. 28,1920.

F. v. D. LONGACR E. VALVE.

APPLICATION FILED AUGLQ, 1919.

. 54 31 8. r Patented Sept. 28, 1920.

2.SHEETSSHEET 2.

INVENTOR EUNITEDI STATES FREDERICK v. D.'LONGACRE, OF YONKERS, NEW YORK, ASSIGNOR TO THE IN'GlE-RSOLE- RAND COMPANY, OF JERSEY CITY, NEW JEEs Y, a CORPORATION OE'NEW JERSEY.

j VALVE. '7

I Application filed August 9, 1919. Serial No. 316,364.

valve of the annular type adapted to im-:

prove the efliciencyand construction of a valve of the plate type. invention relates. to improvements in the type'of valve disclosed inthe patent to Breinl, No. 1,244,286 granted October 23,

1917. Particularly the invention is adapted for the valves, either inlet or discharge, for

compressors for air or other gases, but may also be used with advantage in water pumps. The objects of my invention are to pro vide a valve of the annular plate type which will be simple, compact and e'fiicient in operation and one that will provide, when in its open position, a continuous path for the fluid without abrupt'corners or edges and will permit the fluid to pass through the valve with the least amount of resistance and in continuous stream line paths, ap-

proaching as closely as possible perfect flow with minimum change in pressure and with V A further object of p the invention is to provide an annular plate 7 minimum resistance.

valve suitably shaped on the side that en gages the valve seat which will permit the valve to seat 1n a manner similar to a puppet valve, and one whlch Wlll remain fluid tight indefinitely. A still further object of the invention is to suitably design the passages for the fluid, which is usually air, through the valve seat. and also past the valve and through the cover plate that will guide the fluid without eddies or undue frictional resistance, so that the fluid passing through the valve plate and cover plate.,will'be guidedin continuous streamline paths. In other words, the fluid in passing through the valve from the.- time it passes *theseatplate until it passes away' from the cover plate is guided by the con-;

tours of the valve'seat, the valve plate and cover plate, with thejminimum changes in direction and is maintained in parallel con- 7 Furthermore, the

V tinuous streams in the same manner as the passage of. fluid through an adiabatic nozale, the velocity of the fluid first gradually lncreasing until the fluid reaches the throat after which the velocity decreases again as the; fluid passes the V outer limits of the valve.

With these and other objects in view, my

vinvention consists in the features of construction and operation set. forth in the fol lowing specification. r In the drawings annexed hereto and formmg a part hereof:

Figure I shows a cross sectional view through the central line of a valve made in accordance with the present invention taken in the line l1 of Fig.2;

Fig. 2, a top plan view of the complete valve.

Fig. 8, a cross sectional view of the complete valve when in open position, along the line l1 of Fig. 2;

Fig. 4:, another form of the valve made in Specification of Letters Patent. Pat t Sept accordance with my invention, adapted to ac an inlet valve, in open position.

Flg. 5, a plan view of one form of guide plate and spring arm;

6, a cross-sectional view of the same;

Fig. 7, a plan view of the valve plate;

8, a cross-sectional view of the same; and

Fig. 9, an isometric view of the valve plate, guide plate and spring showing these parts spaced somewhat apart. Referring more particularly to the draw ings, the numeral 1 refers to the wall of a compressor cylinder suitably bored to contain a valve. Reference numeral 2 refers to the valve seat adapted to be inserted within the opening in the cylinder wall of a compressor in the usual manner. Above seat plate 2 is cover plate 3, held in position against the valve seat by a suitable stud 4: and nut 5.

p Lugs 6 extending from the periphery of the cover plate 3 press against side of the passages 8 at an angle rather than on two narrow flat surfaces as in the patent referred to above.

The dished or contoured'shape of the valve 7 enables the central portion ofthe contour of the valve plate 7 forms. walls ;which in conjunction. with the contoured walls of the valve seat 2 form the multipie-ports or passages for the fluid which will. perm-itas, near'as possible stream line flow and a minimum resistance.

.lVhile I-have shownthe valve 7 of mate-' rial of uniform thickness and sultably. forged or pressed 111 the shapeas shown in figures ofthe drawing, I wish it to be understood that the upper surface of the valve may befiat or of any other convenient shape open position.

and still be within the spirit of the invention as expressed in the claims. The valve seat2 at and near its passages S is suitably contoured as shown at 9 anl 10 so that fluid passing through the valve seat is guided in stream likepaths when the valve is in its The points or narrow lines upon which the valve contacts with the seat are two concentric circles passing through points 11 and 12 in Fig. l which form part of the contour of the valve seat2 and do not produce any sharp corners or sudden changes in direction of the fluid, this contact being at points near inner and outer points in the transverse section of the valve plate 7. The cover plate 3, furthermore, is suitably contoured as shown at 13 and l l so that he fluid after passing the valve plate is still guided in paths free from abrupt corners or abrupt changes in direction, and

the tiui d after passing the throat of the passages at the valve is guided and its velocity is reduced again to normal.

In orderto hold the valve 7 in its seated position, spiral springs 15 are provided, in the modification shown, two of these springs being shown, suitably contained in a cavity 16 provided. in the cover plate 3. At the point where the'springs 15 join the valve plate the contour of the. valve plate is somewhat modified, forming a raised portionl? aroundwl'iich the valve spring 15 is adapted to In addition to the valve spring 15 the valve plate is also provided with Fiiuitable spring arms as shown at 18.

15 and surrounding the raised portion 17 in the manner above described.

Preferably the end of the spring arms 18 of the guide plate 22 is suitably contoured clea rly shown in Fig. 6, the part 19 fitting easily about the raised portion of the valve 17.

It will be seen from the above that no riveting or welding is required to hold the end 18 of the guide plate 22 in contact with the valve plate? as this is accomplished by the parts being formed as above described. Vi ith the parts assembled as shown the spring 15 firmly holds the valve plate and guide plate in operative position.

If desired an additional or supplementary spring may be provided on the spring arms 18. These are shown at 20 in Figs. '5 and, 6. At one end they are attached'to the arms 18 by means of rivets or other fastening means '21. These supplementary springs 20 are slightly offset from the arms '18' so that durin the o )enin of the valve 7 the will closer and closer connection with the arms o a. d it thus gradually forces the air trapped between the arms 18 and the valve '4 to be ex'aelled. This forcin of the air irom the recessed portion producing a si htly increased resistance to the opening or valve '7 especially when it approaches its fully opened position, thus aiding in cushioning the valve.

Furthermore, the contact of two convex surfaces produces a construction of minimum initial-line contact and therefore per mits the valve to wear to a minimum sus taining seat, requisite to any'eondition of operation to which the valve may be ap plied, and which condition. can vary, in different applications. This function is of extreme value under different temperature conditions of operation. Also, in case of variation in operation temperature of the valve and seat. The minimum initial con tact surface, permits the valve to wear automatically to its correct tight bearing surfacev for the varying conditions of temperature ant. pressurev to 'whichit may be applied. r

' he modification illustrated in the draws ings has but one annular ring, but it is ob vieus that a number of annular'plate valves 7 may be assembled in one complete valve, the valves being of different diameters grouped concentrically about the stud 4:,

each of the valve plates being suitably guided by a single guide plate having spring 4 arms connected with equally spaced points in the cylinder wall in reverse position so that the valve is adapted to act as an inlet valve. The valve plate in this modification is in every other way similar to that shown in Figs. 1 and 8 the only changes being the changes in the seat 2 necessary for this part to be inserted in the cylinder wall in the re verse position. It will be noted upon examination of Fig. 3 that with the valve plate in its open position, continuous stream line paths are provided for the inrushing fluid.

It is to be understood that the present showing and description disclose only one specific embodiment of my present inven tion, and that other forms andmodiflcations are included within the spirit and scope thereof, as expressed in the appended claims.

What I claim is:

1. In a multi-ported valve for fluid com pressors or pumps, a valve seat, a cover plate held in position against the valve seat, an annular valve plate having its seat engaging surface convexly contoured and extending partly within the passage in the valve seat, said valve plate having a limited movement between said seat and cover plate, and said valve seat, valve plate and cover plate being adapted to permit a continuous stream line flow of fluid entirely through the multi-ports of the valve.

2. In a muiti-portedvalve for fluid compressors or pumps, a valve seat, a cover plate held in position against the valve seat, and a valve plate adapted to seat as a puppet valve on narrow lines of contact along both sides of the passage in said valve seat and within the passage, said valve plate having a limited movement between said valve seat and cover plate.

In multi-ported valve for fluid compressors or pumps, a valve seat, a cover plate held in position against the valve seat, and

an annular valve plate adapted to seat as a puppet valve on narrow lines of contact along said passage in both sides of the valve seat and within the passage, said valve plate having a limited movement between said valve seat and cover plate.

at. In a multi-ported valve for fluid complate held in position against the valve seat, and an annular. valve plate having a limited parallel movement between said valve seat and cover plate, said valve plate seating as a puppet valve on narrow lines of contact along both sides of the passage in said valve seat and within the passage and being adapted when in its open position .to permit a continuous stream' line flow of fluid throughthe inulti-ports of the valve. 7

'5. In a valve for'fluid compressors or pumps, a valve seat, a cover plate, a valve plate having a limited movement between said valve seat and cover plate, and a guide member having spring arms detachably engaging the valve plate without rubbing con tact at equally spaced points therein.

6; In a valve for fluid compressors or pumps, a valve seat, a cover plate, a valve plate having a limited movement between said valve seat and cover plate, a guide member having spring arms detachably attached at equally spaced points in said valve, said spring arms being provided with supplementary spring arms engaging a surface of the valve.

7. In a multi-ported valve for fluid compressors or pumps, a valve seat, a cover plate held in position against the valve seat and provided with at least one passage, and an annular valve plate having a limited parallel movement between said valve seat and cover plate, the walls of the said valve seat, the contour of the valve plate and the walls of the passage in the cover plate being so shaped that when the valve is in open position the fluid is guided so that it may pass completely through said passages and valve plate in stream lines without abrupt turns or the formation of eddy currents and with gradual change in velocity.

8. In a multi-ported valve for fluid compressors or pumps, a valve seat having conveX seating surfaces, a cover plate held in position against the valve seat to limit the movement of the valve plate, and a valve plate having its seat engaging surface convexly contoured whereby a minimum initial line contact is obtained between the valve and its seat, permitting the valve to automatically wear to a minimum sustaining seat.

In testimony whereof, I have hereunto set my hand.

FREDERICK v. D. LONGAORE.

I pressors or pumps, a valve seat, a cover 

